
We propose the multiple-sensing network for updating information of multiple sources. Depending on the information arrival rates and the service rates, the network is categorized as homogeneous or heterogeneous. The stochastic hybrid system (SHS) is established for various cases to derive the average AoI similar to [1]}, [2]}.

A closed-form expression of the average AoI for a single-source multiple-server network under LCFS policy is derived.

We develop a recursive algorithm that calculates the average AoI for LCFS with multiple sources and multiple servers in a homogeneous network. Moreover, closed-form AoI expressions are derived for an arbitrary number of sources and \(n=2,3\)  servers.

The heterogeneous network with a single source is considered. For the cases of \(n=2,3\) , the expressions for the average AoI are developed. For the general case, an algorithm is developed for computing the average AoI.

Simulations are carried out for different queue models and network setups.

